669786892 has 6 divisors (see below), whose sum is σ = 1172127068. Its totient is φ = 334893444.

The previous prime is 669786889. The next prime is 669786907. The reversal of 669786892 is 298687966.

It is a super-2 number, since 2×669786892² = 897228961390039328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 669786892.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83723358 + ... + 83723365.

Almost surely, 2^669786892 is an apocalyptic number.

It is an amenable number.

669786892 is a deficient number, since it is larger than the sum of its proper divisors (502340176).

669786892 is a wasteful number, since it uses less digits than its factorization.

669786892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167446727 (or 167446725 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 61.

The square root of 669786892 is about 25880.2413435424. The cubic root of 669786892 is about 874.9412279436.

The spelling of 669786892 in words is "six hundred sixty-nine million, seven hundred eighty-six thousand, eight hundred ninety-two".